Passive scalar transport in fully developed channel flows

C. A. Petty, S. M. Parks, K. Weispfennig

Research output: Chapter in Book/Report/Conference proceedingChapter

  • 1 Citations

Abstract

An algebraic preclosure for the turbulent flux of a passive scalar constituent is developed by using a spatial smoothing approximation for turbulent space-time correlations. The preclosure relates the flux to three statistical properties of the flow: (1) a scalar relaxation time associated with turbulent autocorrelations and a Green's function propagator; (2) the spatial gradient of the mean concentration; and, (3) a preflux correlation related to fluctuations in the instantaneous turbulent flux and to fluctuations in the instantaneous Reynolds stress. Previously reported DNS results for fully developed channel flows are used to represent the low-order statistical properties of the turbulence needed to evaluate the turbulent flux. The theory permits a priori predictions of the low-order statistical properties of a passive scalar constituent for a wide range of Schmidt numbers. Estimates of the Sherwood number are consistent with previous experimental observations.

LanguageEnglish (US)
Title of host publicationProceedings of the 1999 3rd ASME/JSME Joint Fluids Engineering Conference, FEDSM'99, San Francisco, California, USA, 18-23 July 1999 (CD-ROM)
PublisherAmerican Society of Mechanical Engineers
Pages1
Number of pages1
ISBN (Print)0791819612
StatePublished - 1999

Profile

channel flow
Channel flow
Fluxes
Green function
smoothing
autocorrelation
turbulence
prediction
Autocorrelation
Green's function
Relaxation time
Turbulence

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Engineering(all)
  • Environmental Science(all)

Cite this

Petty, C. A., Parks, S. M., & Weispfennig, K. (1999). Passive scalar transport in fully developed channel flows. In Proceedings of the 1999 3rd ASME/JSME Joint Fluids Engineering Conference, FEDSM'99, San Francisco, California, USA, 18-23 July 1999 (CD-ROM) (pp. 1). American Society of Mechanical Engineers.

Passive scalar transport in fully developed channel flows. / Petty, C. A.; Parks, S. M.; Weispfennig, K.

Proceedings of the 1999 3rd ASME/JSME Joint Fluids Engineering Conference, FEDSM'99, San Francisco, California, USA, 18-23 July 1999 (CD-ROM). American Society of Mechanical Engineers, 1999. p. 1.

Research output: Chapter in Book/Report/Conference proceedingChapter

Petty, CA, Parks, SM & Weispfennig, K 1999, Passive scalar transport in fully developed channel flows. in Proceedings of the 1999 3rd ASME/JSME Joint Fluids Engineering Conference, FEDSM'99, San Francisco, California, USA, 18-23 July 1999 (CD-ROM). American Society of Mechanical Engineers, pp. 1.
Petty CA, Parks SM, Weispfennig K. Passive scalar transport in fully developed channel flows. In Proceedings of the 1999 3rd ASME/JSME Joint Fluids Engineering Conference, FEDSM'99, San Francisco, California, USA, 18-23 July 1999 (CD-ROM). American Society of Mechanical Engineers. 1999. p. 1.
Petty, C. A. ; Parks, S. M. ; Weispfennig, K./ Passive scalar transport in fully developed channel flows. Proceedings of the 1999 3rd ASME/JSME Joint Fluids Engineering Conference, FEDSM'99, San Francisco, California, USA, 18-23 July 1999 (CD-ROM). American Society of Mechanical Engineers, 1999. pp. 1
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